Methods for filtering a file written in Extensible Application Markup Language (XAML) and incrementally returning the logical content contained therein to the environment, e.g., a search engine, are provided. Additionally provided are methods for extracting logical content contained in a XAML file to facilitate searching and/or indexing thereof. The methods provided permit the filtering of files containing only flow-format elements, files containing only elements representing fixed-format pages, and/or files containing both flow-format and elements representing fixed-format pages.